The Copper Basin Federal Credit Union All Credit Levels is a cdfi lender from Copper Basin Federal Credit Union. The ongoing APR is 4.7% - 10%. This product reports activity to your personal credit report. Copper Basin Federal Credit Union is a community-focused financial institution located in Copperhill, TN, offering a range of financial services and competitive loan rates to its members. Established in 1965, it serves individuals living, working, or worshipping in Polk County, TN, and Fannin, Gilmer, and Union Counties in GA. Services include: auto loans, personal loans, home & land loans, student loans, credit cards. US Treasury certified CDFI Credit Union in Copperhill, TN. Membership required.